Work holder



. 8, 1942. w. B. PAINTER WORK HOLDER Filed Sept. 8, 1941 A1 lo Ali FIGJ.

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WILLiAM 9. PAINTER BY 2 Patented Dec. 8, 1942 UNITED STATES PATENT OFFICE 2,304,317 worm HOLDER William B. Painter, Dearborn, Mich. Application September 8, 1941, Serial No. 410,095

Claims. (01. 81-38) f This invention relates generally to work holders and refers more particularly to those designed for holding work upon a supporting surface of a vise.

Heretofore the devices for holding work upon a supporting surface of a vise have been objectionable either because they raised or lifted the work relative to the supporting surface instead of holding it down thereon when the devices were operated by the jaws of the vise, or they were too complicated or expensive for practical purposes in a shop or factory.

In the present instance, I have overcome. the objections mentioned by the provision of asimple and inexpensive hold-down that will actually force the work down and hold it down upon the supporting surface of thevise ,whenthe holddown is operated by the jaws of said vise;

In the accompanying drawing:

Figure 1 is a fragmentary elevation of a vise, and showing hold-downs embodying my invention upon opposite sides of work upon the sup porting surface of said vise; 3

Figure 2 is a top plan view of one of the holddowns;

Figure 3 is a cross section taken on the line 3-3 of Figure 2;

Figure 4 is a view similar ing a slight modification;

Figure 5 is a view similar to Figure showing another modification.

Referring now to the drawing, A is the supporting surface for the work, and B and C, respectively, are the cooperating jaws of a vise of conventional construction.

D designates the work resting upon the supto Figure 1, but show- 3, but

porting surface A, while E and F, respectively,

are the devices embodying my invention for holding the work D down upon said supporting surface A.

As shown, the devices E and'F are upon opposite sides of the work D on the supportingsurface A between the jaws B and C of the vise and are similar in construction. Each device comprises an elongated member ID, preferably a meta1 bar, substantially wedge-shape in cross section, having inclined side edges II and I2, respectively, and a substantially fiat bottom l3 provided substantially midway said edges with a longitudinally extending rib M of substantially rectangular cross section.

When placed on the supporting surface A, the inclined rear edges H of the bars extend downwardly and away from the jaws B and C of the vise, while the inclined front edges l2 extend upwardly and away from the work D. The nb I4 rests upon the supporting surface A of th vise and thereby spaces above said supporting sur-. face the inclined edges II and [2, so that upon operation of one or both jaws B and C, the bars E and F Will tip or rock on the ribs I4 in the 'direction of the arrows l5 and I6, respectively. 1 In doing so, the forward edges I2 of the bars E and F will not only engage and bear firmly against the adjacent sides of the work D near the bottom thereof but will exert a positive and constantdownward pressure upon the work so as to urge or force said work down and hold it firmly upon the supporting surface A of the vise. In Figure fl I have illustrated a slight modification wherein the hold-downs E and F are usedon top of conventional uprights or parallels G. and. 1-1, respectively, disposed between. the work. D" and the jaws B and C ofa vise -As shown, the hold-downs E and F are identicalin construction .to the hold-downs E and F illustrated in Figures 1 to 3, inclusive, but'are used on top of the parallels G and H, respectively, for engagement with the work D near its upper end. When one or both jaws B and C are operated, thehold-downs E andF' will tip or rock on the parallels G and H in the direction of the arrows l1 and I8, respectively, and in doing so will cause the forward edges l2 of the bars to initially en. gage and bear firmly against the adjacent sides of the work D and then to urge the work down and hold it firmly upon the supporting surface A of the vise.

Figure 5, I have illustrated another modification wherein the rib M on the underside of the bar E constituting the work holder extends transversely thereof from its inclined rear edge H to a point in spaced relation to the inclined front edge 12. Thus, the forward edge 2 of the bar will be spaced above and clear of the supporting surface such as A of a vise, but may swing or move downwardly relative thereto when forcing or holding the work down on the supporting surface of the vise.

In either instance, the bars constituting the hold-downs may be any length or width desired and may be formed of any suitablematerial. The essence of the invention resides in the provision of the ribs uponthe underside thereof in combination with the inclined side edges respectively so that the forward edges of the hold downs will initially be spaced above the supporting surface of the vise and such hold-downs may tip or rock as aforesaid to force the work down and hold it down on the supporting surface of the vise.

What I claim as my invention is:

1. A device of the class described for use with the clamping jaws of a vise for holding an interposed piece of work down upon the supporting surface of the Vise, comprising an elongated member substantially wedge shape in cross section having a substantially flat bottom provided with a longitudinally extending supporting rib of substantially rectangular cross section for rocking engagement with said supporting surface, said elongated member being entirely separate from the vise and adapted to extend transversely of the vise between one of the clamping jaws thereof and the work piece and having opposite longi,-.

tudinal edges thereof inclined upwardly and rearwardly with respect to said work piece, the construction and arrangment of the rib and inclined edges of said member being such that the point of contact between the foremost inclined edge of the member and work piece is above the supporting surface of the vise but below the plane of contact between the'rearmost inclined edge of said memberand clamping jaw so that such member is adapted upon being actuated by one of said clamping jaws to rock on the rib aforesaid and thereby exert a downward pressure against the work piece to hold the same firmly upon the supporting surface of the vise.

'2. A one piece device of the class described for use with the clamping jaws of a Vise for holding an interposed piece of work down upon the supporting surface of the vise, comprising an elongated member substantially wedge shape in' cross section provided on the underside thereof with a longitudinally extending supporting rib for rocking engagement with said supporting surface, said elongated member being entirely separate from the vise and adapted to extend transversely thereof between one of the clamping jaws thereof and the work piece and having opposite longitudinal edges thereof inclined upwardly and rearwardly with respect to said work piece, the construction and arrangement of the rib and inclined edges of said member being such that the point of contact between the foremost inclined edge of the member and work piece is above the supporting surface of the vise but below the plane of contact between the rearmost inclined edge of said member and clamping jaw so that such member is adapted upon being actuated by one of r said clamping jaws to rock on the rib aforesaid and thereby exert a downward pressure against the work piece to hold the same firmly upon the supporting surface of the vise.

3. A device of the class described adapted to be inserted between a work piece and a clamping jaw of a vise for holding said work piece down upon the supporting surface of the vise, comprising an elongated member provided on the underside thereof substantially midway opposite longitudinal edges thereof with a longitudinally extending supporting rib for rocking engagement with said supporting surface, said elongated member being entirely separate from the vise and adapted to extend transversely thereof between the clamping jaw thereof and the work piece, op-

posite longitudinal edges of said member being inclined upwardly and rearwardly with respect to said work piece, the construction and arrangement of the rib and inclined edges of said member being such that the point of contact between the foremost inclined edge of the member and work piece is above the supporting surface of the vise but below the plane of contact between the rearmost inclined edge of said member and clamping law so that such member is adapted upon being urged by said clamping jaw against said work piece to rock on the rib aforesaid and thereby exert a downward pressure against the work piece to hold the same firmly upon the supporting surface of the vise.

' 4. A device of the class described for use with the clamping jaws of a vise for holding an interposed piece of work down upon the supporting surfaoeof the Vise, comprising an elongated member entirely separate from the vise and adapted to extend transversely thereof between a clamping jaw thereof and the work piece and having opposite longitudinal edges thereof inclined upwardly and rearwardly with respect to the Work piece, the underside of said member being provided transversely thereof from its rearmost inclined edge to a point in spaced relation to its foremost inclined edge with a longitudinally extending supporting rib for rocking engagement with the supporting surface of the vise, the point of contact between the foremost inclined edge and work piece being spaced by said rib above the supporting surface of the vise but being below the plane of contact between the rearmost inclined edge of said member and clamping jaw whereby said member is adapted upon being urged by said jaw. against said work piece to rock on said rib and exert a downward pressure against the work iece to hold thesame firmly upon the supporting surface therefor of the vise.

5. A one piece device of the class described for use with the clamping jaws of a vise for holding an interposed piece of work down upon the supporting surface of the vise, comprising an elongated member entirely separate from the vise and adapted to extend transversely thereof between a clamping jaw thereof and the work piece and having opposit longitudinal edges thereof inclined upwardly and rearwardly with respect to the work piece, the point of contact between the foremost inclined edge and work piece being below the plane of contact between the rearmost inclined edge of said member and clamping jaw whereby said member is operable upon being urged by said jaw against said work piece to exert a downward pressure against the work piece to hold the same firmly upon the supporting surface therefor of the vise, the underside of said member being provided with a longitudinally extending supporting rib for rocking engagement with said supporting surface, the construction and arrangement of said rib relative to said member being such that the point of contact between the foremost inclined edge of the member and the Work piece is initially spaced above the supporting surface of the vise.

WILLIAM B. PAINTER. 

